I cant believe this lady

Im at the nail salon. Some older Dominican woman is doing my pedicure. My phone rings. Its my cousin. So I begin a private conversation over the phone. This lady now joins the conversation. I didnt ask her for her opinion. I shouldn't have acknowledged her? Now she's upset cause I dont agree with her saying that a 3rd world country isnt safe for surgery. Im 4th generation born and raised in NYC. I stick up for my country. But I also dont put down any others country or beliefs. Do I tip this lady now? She even raised her voice at me. The Asian owner looked up at us. I smiled at the owner and rolled my eyes. I just realized she didnt even put top coat on my red pedicure. ok im not tipping her forget I asked 😡😡😡😡